Casing or drive-pipe screwer for well-rigs.



N6. 741,925. PATENTED OCT. 20, 1903.

R. s. OILEB. GA'SING'OR DRIVE PIPE .SGREWERFOR WELL mes.

APPLICATION F ILED AUG. 7, 1902.

N0 MODEL.

witnesses l i l NTTED STATES Patented October 20, 1903.

PATENT 1. FFICE.

ROBIN S. OILER, OF LOS ANGELES, CALIFORNIA.

SPECIFICATION forming part of Letters Patent 110. 741,925, dated October20, 1903.

Application filed August '7, 1902. Serial No. 118,823. (No model.)

To all whom it may concern Be it known that I, ROBIN S. OILER, a citizenof the United States, residing at Los Angeles, in the county of LosAngeles and State of California, have invented a new and useful Casingor Drive-Pipe Screwer for Well- Rigs, of which the following is aspecification;

An object of this invention is to provide simple and convenient meansfor screwing and unscrewing well-casing or drive-pipe by motive power. Iaccomplish this object by providing a wheel adapted to encircle thewell-casing, a support for said wheel, means for connecting the wheelwith the well-casing, and means for rotating the wheel. Said wheel isdesirably an annular rim, and the same is supported and-held againstlateral displacement by antifriction-rollers.

The accompanying drawings illustrate the invention.

Figure I is a plan of the invention applied in a standard well-rig, aportion of which is shown. Fig. II is a side elevation of the same. Fig.III is a fragmental detail plan of the wheel, its antifriction-support,and the devices by which it is connected with the well-casing forturning the same. Said wellcasing is also shown. Fig. IV is a verticalsection on irregular line IV IV, Fig. III, a fragment of the casingbeing shown. Fig. V is a detail of the pulley for driving the bullrope.Fig. VI is a detail of a fragment of the wheel and the adjustable devicefor bold ing one end of the casing-pole.

1 designates a well-casing. 2 is a wheel mounted to turn coaxially ofsuch casing. 3 is a bull-rope for driving the same.

4 is a driving-pulley of a standard well-rig, (indicated in a generalmanner by 5.)

Means are provided for detachably connecting the wheel 2 with thecasing 1. Any suitable means may be employed for this purpose. Suchmeans, as shown, comprise a casing-rope 6, a casing-pole 7, and pins 8and 9,.connected with the wheel 2 for engagement with the casing-pole7to turn the'same around the axis of the casing when connected with thecasing by the casing rope 6, as shown in Fig. 111.

10 is a frame mounted on any suitable support, as the derrick-floor 11,and provided with rollers 12, which support the wheel 2.

Said wheel is desirably formed in a grooved ,ring the inner face 13 ofwhich is convex in cross sectiou, and the support is formed with groovedrollers 12, in which the convex face 13 runs, so that the wheel 2 issupported by the rollers 12 practically against both vertical andlateral movement.

14 designates brackets fastened to the frame 10 for supporting thegrooved rollers 12, which are arranged in a circle coaxially with thewell-casing 1.

15 is a slotted bracket fastened to the rim or wheel 2 in order to adjustably mount the pin 8 on the same. Said pin is desirably passedthrough the slot 16 of the bracket and fastened by a nut 17. The purposeof this adjustment is to enable the workman to bring the casing-poletight against casing of any of the sizes of well-casing inuse, thusenabling the device to be readily applied to screw or unscrew any-sizedcasing.

The frame 10 may be composed of an outerring a, cross-bars b a, formingsupports for the frame, and stays d e, fastened to said ring Ct.

f and g designate two bars adj ustably con nected with the cross-bars bc andadapted to be brought into position to support the easing-elevatorand to thereby cause the weight of the casing to hold the frame.

In practical use the frame 10 will be brought into appropriate positioncoaxial with the well, and when the casing is tobe screwed or unscrewedthe usual elevator 18 will be applied to the casing in the usual mannerand will be allowed to rest on the cross-bars or supports f, which arefastened to the crossbars b of the frame. When the weight of the casingand the elevator is allowed to come upon the supports f g, thecross-bars b and the frame 10 to which they are secured are firmly heldagainst rotation. Thecollar it will be held by casing-tongs i in theusual way to prevent rotation, and the casing-joint j, which is to bescrewed or unscrewed, will be connected with the wheel or rim 2 by somesuitable means. For instance, the rope 6 will be hitched to thecasing-joint j in the usual way and the pole 7 will be passed throughthe loop of said rope 6 and brought against the casingj and intoengagement with the pins 8 and 9. The bull-rope 3 being in place, the

engine (not shown) may be started and the bull-rope 3 driven to rotatethe wheel or rim 2 in the desired direction.

In Fig. III the pole is shown adjusted for screwing the casing,asindicated by the arrow on the rim.

By applying the rollers inside the rim 2 I have made it possible todrive the rim by a bull-rope, thus affordinggreat simplicity ofconstruction and operation.

Having described my invention, what I claim, and desire to secure byLetters Patent of the United States, is-

1. An annular rim adapted to encircle a well-casing, upright rollersinside said rim and forming a support therefor to prevent lateraldisplacement, means for detachably connecting said rim to a well-casing,and means encircling the rim for rotating the same.

2. In awell-rig, a wheel adapted to encircle a well-casing, a supporttherefor, means for detachably connecting the wheel to a wellcasing, abull-rope for driving the wheel, and means for driving the bull-rope.

3. An annular rim adapted to encircle a well-casing, uprightantifriction -rollers inside the rim, and forming a support therefor tohold it against lateral displacement, a pole spanning said rim, meansfor connecting the pole with the casing, means for connecting the polewith the wheel, and means for rotating the wheel.

4. An annular rim adapted to encircle a well-casing,antifriction-rollers inside the rim and forming a support therefor tohold it against lateral displacement, a pole spanning said rim, meansfor connecting the pole with the casing, pins for connecting the polewith the wheel, and means for rotating the wheel.

5. A frame, an annular rim, rollers connected with the frame andarranged in a circle, inside said rim to prevent lateral displacement,means encircling the rim for rotating the same, and means for detachablyconnecting the rim with a well-casing.

6. A frame, rollers connected with the frame and arranged in a circle, acircular rim surrounding said rollers and carried thereby, means forrotating the rim, means for detachably connecting the rim with thewell-casing, and means connected with the frame for supporting theelevator which supports the casing, whereby the frame is held fromturning.

7. In a device of the class described,in combination, an annular rimadapted to encircle a well-casing,a support therefor, a pole spanningsaid rim, means for connecting the ends of the pole to opposite sides ofsaidrim, a bull-rope for driving said rim and therewith said pole andoperatively connecting said pole with said casing, and means for drivingthe bull-rope.

8. In a device of the class described, in combination, an annular rimadapted to encircle a well-casing, a support therefor, a pole spanningsaid rim, adjustable means connecting said pole to opposite sides ofsaid rim, abullrope for driving said pole with said casing, and meansfor driving the bull-rope.

9. In an apparatus of the class described, in combination, an annularrim adapted to encircle a well-casing, a support therefor, a polespanning said rim, hearings on said rim against which said pole bearsduring revolution, one of said bearings being adjustable, a casing-ropeconnecting said pole with said casing, and means for driving saidcasingrope.

10. In an apparatus of the class described, in combination,an annularrim adapted to encircle a well-casing, asupport therefor, a polespanning said rim, a stationary pin on said rim, a second pin adjustablymounted in a slotted bearing on the opposite side of said rim, said poleadapted to bear against said pins during the revolution of said rim, abullrope for driving said pole with said rim, and means for driving saidbull-rope.

11. In adevice of the class described,in'combination, an annular rimadapted to encircle the well-casing, provided with a rope-engaginggroove, and with hearings on opposite sides of its upper face, a polespanning said rim and bearing against said bearings, a support for saidrim, antifriction devices on said support engaging said rim, a bull-ropefor driving said rim, means for driving said bullrope, and a casing-ropeengaging said casing and pole.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing Witnesses, at Los Angeles, in the county ofLos Angeles and State of California, this 31st day of July, 1902.

R. S. OILER.

Witnesses:

.IAMEs R. TOWNSEND, JULIA TOWNSEND.

